Coltland Twins where Ryland invites Colt to come to his class at the end of each year after exams are up as a treat for the kids.
Colt showing up and answering questions and being a general chaotic nuisance but proving that the stuff they're learning can be applied to jobs that aren't just working in a lab - he uses a lot of what they're learning basics of in stunt work!
It's a yearly thing from the very first year of Ryland teaching.
Fast forward to the year that Ryland disappears on his class, gets sent to space against his will while the world at large is told he volunteered.
Colt shows up the same time he had every year to see Ry's kids. The looks of hope in their eyes cut to his soul, as do the fallen smiles when they realize it's Colt at the front of the room, not Ryland.
He showed up despite knowing his brother wouldn't be there, because he was not going to break the last promise he ever made to his twin brother dammit. Instead of talking about the job and applied sciences, he sits down and shares stories with these kids about his brother - because he knows how much these kids meant to Ryland. And they deserve to know it, too.
